Question
Download Solution PDFWhich drilling machine is suitable for drilling more number of holes in the different location without disturbing the job setting?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Portable hand drills
Portable hand drills of different types are used for certain jobs which cannot be handled on stationary drilling machines.
The electric hand drill has a small electric motor for driving the drill. At the end of the spindle, a drill chuck is mounted.
It is very commonly used for drilling holes in such components that cannot be transported to the shop due to their size or weight.
It is used for light duty with a usually single speed.
Radial drilling machine
The radial drilling machine has a radial arm on which the spindle head is mounted, The spindle head can be moved along the radial arm and can be locked in any position.
The arm is supported by a pillar (column). It can be rotated about with the pillar as a centre.
Therefore, the drill spindle can cover the entire working surface of the table. The arm can be lifted or lowered.
Radial drilling machines are used to drill
- large diameter holes
- multiple holes in one setting of the work
- heavy and large work-pieces
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